公开(公告)号：US20240288310A1

公开(公告)日：2024-08-29

申请号：US18689981

申请日：2021-09-14

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Hassane OULACHGAR ,  Christine ALAIN ,  Francis GENEREUX

IPC: G01J5/20 ,  G01J5/00 ,  G01J5/08 ,  G01J5/0802

CPC classification number: G01J5/20 ,  G01J5/0802 ,  G01J5/0884 ,  G01J2005/0077 ,  G01J2005/204

Abstract: A microbolometer pixel unit for detection of terahertz radiation includes a substrate, a thermistor structure, and an optical absorber structure. The thermistor structure includes a plurality of microbolometer pixels disposed on the substrate. Each pixel includes a thermistor platform suspended above the substrate, a thermistor support member holding the thermistor platform, and a thermistor disposed on the thermistor platform and having an electrical resistance that varies in accordance with a temperature of the thermistor. The optical absorber structure includes an absorber platform suspended above the thermistor structure, an absorber support member holding the absorber platform and including a plurality of support elements, each support element providing a thermal conduction path from the absorber platform to the thermistor platform of a respective one of the microbolometer pixels, and an optical absorber disposed on the absorber platform to absorb incoming terahertz radiation to generate heat to change the temperature of the thermistors.

公开(公告)号：US20230328340A1

公开(公告)日：2023-10-12

申请号：US18040699

申请日：2021-09-08

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Michel DOUCET ,  Alain BERGERON ,  Francis GENEREUX ,  Hassane OULACHGAR ,  Marc TERROUX

IPC: H04N23/13 ,  G02B27/56 ,  G02B3/02 ,  G02B1/11 ,  G02B7/00 ,  G01N21/3581

CPC classification number: H04N23/13 ,  G02B27/56 ,  G02B3/02 ,  G02B1/11 ,  G02B7/003 ,  G01N21/3581 ,  G02B2003/0093

Abstract: An imaging system that includes an image sensor and imaging optics is provided. The image sensor has a sensing surface and it captures images of a scene. The imaging optics is optically coupled to the image sensor and is configured to form the images of the scene onto the sensing surface of the image sensor. The imaging optics includes a sensor-adjacent optical element having an exit surface located in close proximity to the sensing surface of the image sensor. The exit surface of the sensor-adjacent optical element and the sensing surface of the image sensor are spaced apart by a gap having a gap width enabling evanescent-wave coupling from the exit surface to the sensing surface for light having wavelengths within the sensor spectral range.